Waterproof cement and method of making the same.



COMPOSITIONS, COATING R PLASTIC.

UNITED STATES Examine:

PATENT OFFICE.

JACOB F. SLT-HOELLKOPF, OF BUFFALO, NEW YORK, ASSIGXOR TO SGIIOELLKOPF, HARTFORD & HANNA COMPANY, OF BUFFALO, NEW YORK.

WATERPROOF CEMENT AND IMETHOD OF MAKING THE SAME.

T 0 all whom it may concern:

Be it known that I, JACOB F. ScHoELL- KOPF, a citizen of the United States, residing at Buffalo, in the county of Erie and State of 5 New York, have invented a new and useful Improvement in \Vaterproof Cements and Methods of Making the Same, of which the following is a specification.

This invention relates to the waterproofin" of mineral cements, for mm lam cement, used for the production at artifi cial stone or stone-like compositions of matter, by mixing with the cement a substance which renders the cement or the composition of which it forms part waterproof when the cement has set.

In practicing this invention rosin or colohonv combined with a suitable Base, such as lime or barvta" bane-mend or'hvdrat formlng L Si1 l l Wm I when mixed'wi'th the cement; renders the stone or other composition in which the oement is used waterproof. Rosin or colophony contains a arge proportion of abietic acid and this acid may be used insteat o THE rosin or colophony of commerce, but as the percentage of this acid in rosin or colophony is usually very high it is unnecessary to purify the rosin or separate the acid from the small percentage of accompanying substances. The rosin salt, or abietic acid salt, contemplated by this invention is therefore one which is produced from the rosin or colophony of commerce or from the acid which constitutes the bulk of rosin or colophony.

Two arts by wei ht 0 one ar 0 rosin orm a su1'a e lnxture. I he qulck lime 1s nnxed with the powdered rosm. Water is then added 111 sufliclent quantity to saie tie line. The mass is then thoroughly stn'red untll the rosln is combined with part of the lime. The resulting substance consists mainly of the roportlons provide a considerable excess of ime, which is desirable because the heat liberated in slaking the lime aids in melting the rosin and the uncombined calcium hy- 45 i bieti l salt of lime and uncg nbingd calhydrate, smce 1e above mentioned Specification of Letters Patent.

Application filed May 11, 1908.

drate acts in the resulting mixture as a Patented Aug. 10, 1909.

Serial No. 432,133.

diluent for the salt. About twp )er cent. of th is p.l10duc-tQnmixture added to ortland l 6 similar cement will be sullicieiitm:

proo t 1e stone or composition in which'the cement is used. The above mentioned proportion of ingredients may, however, be varied to a considerable extent as the particular use for which the cement is intended may render desirable.

Barvta or barium h *drate is used preferably m the form of a concentrated watery solution in about the proportion of one part, by dry weight, of baryta or barium hydrate and two parts of rosin.

The solution and ground or pulverized rosin are mixed in any suitable manner under the application of heat until the desired combination has been effected. This salt, when dried, may be diluted with dry slaked lime in about the pro )ortion of one part of salt to three parts of ime.

The herein described rosin salts are not only very efficient and reliable insoluble or waterproofing ingredients for admixture with mineral cements but are also very easily produced at comparatively small expense, particularly the lime salt, and therefore very desirable when large quantities of cement in structural work are required to be waterproofed.

The resinat e or insoluble re si n salt is uncombined witli cla y o'i siinilar matter foreign to the base of the resinate which would reduce the waterproofmg action of the resinate. A comparatively small proportion of the resinate or resin salt will there be sutlicient for admixture with the mineral cement. For illustration, in the example hereinbefore stated in which the li n1 e salt of rosin is used, the addition of two er cent. of the mixture of rosin salt of lime an mbined lime is suificient for the urposc, although this mixture contains only about 0.66 e1 cent.. of rosin as compared with tliehnneral cement to wliichtheinixture is added? I claim as my invention:

1. The herein described dry cement comprising a mineral cement and an insoluble resin salt uncombined with material foreign to the base of said salt, substantially as set forth.

2. The herein described dry cement com- I than two per cent. of resin, substantially as prising a mineral cement and an insoluble set forth. 10 resin salt of lime uncombined with material Witness my hand in the presence of two foreign to the base of said salt, substantially subscribing witnesses.

5 as set forth. JACOB F. SCI-IOELLKOPF.

3. The herein described dry cement com- Witnesses: prising a mineral cement and an insoluble E. C. HARD, resin salt, said dry cement containing less 0. B. HORNBEOK.

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